C8051F300 Datasheet, PDF (126/176 Pages) List of Unclassifed Manufacturers – Mixed Signal ISP Flash MCU Family

C8051F300/1/2/3/4/5
Table 13.4. SMBus Status Decoding (Continued)
Values Read
Current SMbus State
Typical Response Options
Values
Written
1000 1 0 X A master data byte was received; Acknowledge received byte; 0 0 1
ACK requested.
Read SMB0DAT.
Send NACK to indicate last 0 1 0
byte, and send STOP.
Send NACK to indicate last 1 1 0
byte, and send STOP fol-
lowed by START.
Send ACK followed by
repeated START.
101
Send NACK to indicate last
byte, and send repeated
START.
100
Send ACK and switch to
Master Transmitter Mode
(write to SMB0DAT before
001
clearing SI).
Send NACK and switch to
Master Transmitter Mode
(write to SMB0DAT before
clearing SI).
000
0100 0 0 0 A slave byte was transmitted;
NACK received.
No action required (expect- 0 0 X
ing STOP condition).
0 0 1 A slave byte was transmitted;
ACK received.
Load SMB0DAT with next
data byte to transmit.
00X
0 1 X A Slave byte was transmitted;
error detected.
No action required (expect- 0 0 X
ing Master to end transfer).
0101 0 X X A STOP was detected while an No action required (transfer 0 0 X
addressed Slave Transmitter. complete).
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